fix: add title for brands

Author: vvo

example/index.html

@@ -15,6 +15,8 @@ <h1>Instant search demo <small>using instantsearch.js</small></h1>
     <div class="row">
       <div class="col-md-3">
         <div id="search-box"></div>
+
+        <h2>Brands</h1>
         <div id="brands"></div>
       </div>
       <div class="col-md-9">